We put 1850 miles on our hihy back in july. It was a joy to drive and it got the best milage that it has ever gotten. We got rid of our 04 durango after pulling a 6x12 trailer to lasvegas and back from minnesota.I was so unhappy with that pile i got rid of it 1 day after the trip.(feul milage for the 1700 mi trip each way was 8.9mpg) I hooked the same trailer up to the highlander and drove about the same speed and averaged 16.4 mpg on a 30 mile test.Other wise I've had 30.4 to 19.8 mpgs. Winter driveing is not a fair test.I use a lot of gas letting it warm up and i dont thing that should count when fiqureing your milage.